Hsi-Hwa Tso, H. Tsay, Jo-Hwa Li
Nov 1, 1995
Citations
0
Influential Citations
8
Citations
Journal
Synthetic Communications
Abstract
Abstract A facile synthesis of 3-substituted methyl 4,6-dihydrothieno[3,4-b]thiophene-carboxylate 5,5-dioxides 1 from 3-(phenylthio)-4-acyl-3-sulfolenes 2 and their use as stable precursors of o-dimethylene thiophene 3 in [4 + 2] cycloaddition are described.